So I have this rule (thanks to my stupid workplace having a no "hoodie" rule but not a 'no hooded sweatshirt' rule) that I will totally wear hooded shirts that don't blatantly advertise a brand or location. To me, that is what separates a hooded sweatshirt from a hoodie in all the arguments I've had with my boss. I'd also say "loose fitting" and having a front pocket, but after a protracted argument, brands are where we draw the line, so I cannot rock that hoodie, because I could not wear that at work, which is ultimately how I justify most of my clothing purchases to my wife.